
Central ECU
UC-Aerospace/Hybrid25_ECU
The central ECU is pretty simple and carries out a couple of tasks. Firstly is comms which is easy to see with CAN on the left and RS422 on the right of the schematic.

USB-C coin cell battery charger for charging 4 LIR2032
LIR2032 Battery Charger is an open-source printed circuit board by curiousmindsdev, from the curiousmindsdev/LIR2032_Battery_Charger repository on GitHub, published under the MIT licence. It is a 2-layer board of 40 × 75 mm with 40 parts on 29 nets, routed with 186 tracks and 0 vias.
It is built around the XT4051K421KR-G and CTS05S40,L3F. Its parts include 11 resistors, 8 capacitors, 6 diodes, 4 ICs and 1 connector. It belongs with the power boards of this library.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C11, C12, C21, C22, C31, C32, C41, C42 |
| 5 | 1K | Resistor_SMD:R_0402_1005Metric | R3, R11, R21, R31, R41 |
| 4 | 15K | Resistor_SMD:R_0402_1005Metric | R12, R22, R32, R42 |
| 4 | CHRG | LED_SMD:LED_0402_1005Metric | D11, D21, D31, D41 |
| 4 | LIR2032 | Footprints:CR2032_Plastic_Battery_Holder | BT1, BT2, BT3, BT4 |
| 4 | XT4051K421KR | Footprints:SOT-553 | U1, U2, U3, U4 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 1 | 500mA | Fuse:Fuse_0402_1005Metric | F1 |
| 1 | CTS05S40 | Footprints:CST2 | D1 |
| 1 | LOGO | Footprints:CMD_Logo(10x5mm)_FMask | G*** |
| 1 | PWR | LED_SMD:LED_0402_1005Metric | D2 |
| 1 | USB-C | Footprints:USB-C_Connector | J1 |
The 36 most common of 40 parts.

UC-Aerospace/Hybrid25_ECU
The central ECU is pretty simple and carries out a couple of tasks. Firstly is comms which is easy to see with CAN on the left and RS422 on the right of the schematic.



hackclub/OnBoard
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Chrismettal/EleLab_v2
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Chrismettal/flipper-zero-backpacks
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It measures 40 × 75 mm and has 2 copper layers, 1.6 mm thick.
40 parts, built around the XT4051K421KR-G and CTS05S40,L3F. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the curiousmindsdev/LIR2032_Battery_Charger repository on GitHub, at the commit this page was made from: the board is Rev.1.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).